SOLUTION: A straight line that is parallel to line -x+2y+2=0 and passes through the points (a,1) and (2,2).find the value of a.

Algebra ->  Points-lines-and-rays -> SOLUTION: A straight line that is parallel to line -x+2y+2=0 and passes through the points (a,1) and (2,2).find the value of a.      Log On


   

Question 919309: A straight line that is parallel to line -x+2y+2=0 and passes through the points (a,1) and (2,2).find the value of a.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
the standard slope-intercept form for an equation of a line is
y+=+highlight_green%28m%29x+%2B+highlight%28b%29 where m is the slope and b the y-intercept.
-x+2y+2=0 0r y = (1/2)x - 1, m = 1/2
.........New Line(Slope also 1/2, Lines parallel have same slope)
(a,1) and
(2,2) m =%28y%5B1%5D+-+y%5B2%5D%29%2F%28x%5B1%5D+-+x%5B2%5D+%29 = -1%2F%28a-2%29+=+1%2F2, a-2+=+-2,+highlight_green%28a=0%29